11841421 has 2 divisors, whose sum is σ = 11841422. Its totient is φ = 11841420.

The previous prime is 11841409. The next prime is 11841437. The reversal of 11841421 is 12414811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9853321 + 1988100 = 3139^2 + 1410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11841421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11841392 and 11841401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11844421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5920710 + 5920711.

It is an arithmetic number, because the mean of its divisors is an integer number (5920711).

Almost surely, 2^11841421 is an apocalyptic number.

It is an amenable number.

11841421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11841421 is an equidigital number, since it uses as much as digits as its factorization.

11841421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 256, while the sum is 22.

The square root of 11841421 is about 3441.1365854903. The cubic root of 11841421 is about 227.9298863615.

The spelling of 11841421 in words is "eleven million, eight hundred forty-one thousand, four hundred twenty-one".